Leveling structure and lifting mechanism of 3D printer substrate

Abstract

The utility model relates to the technical field of lifting of base plates of 3D printers, and particularly discloses a leveling structure and a lifting mechanism of a base plate of a 3D printer. The two fine adjustment mechanisms are symmetrically arranged at the bottom of the bottom plate, and each fine adjustment mechanism comprises a leveling assembly and a detection assembly installed on the leveling assembly; the levelness of the two ends of the bottom plate is adjusted through the fine adjustment mechanism, so that the whole levelness is promoted, the device has the advantages of being convenient to adjust and high in precision, a basis is provided for precise printing, the percent of pass of product printing is increased, and cost waste caused by the reject ratio is reduced; through relative movement of the first linkage gear and the second linkage gear, the first linkage rod and the second linkage rod are matched to drive the second supporting column to move up and down in the first supporting column for adjustment, lifting of the base plate is achieved, the lifting mechanism has the advantages of being sensitive in response, synchronous and small in abrasion, lifting stability and response speed are improved, and meanwhile maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting of a bottom plate of a 3D printer, and in particular discloses a leveling structure and a lifting mechanism of a base plate of a 3D printer. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.

[0003] 3D printing is to stack materials on the base plate through the nozzle to form the required object structure. The level of the base plate will directly affect the success of the printed object. Therefore, it is necessary to ensure that the base plate is in a horizontal state during the printing process. At present, the level adjustment of 3D printers is only achieved by rotating the four support feet under the base to achieve a stable support with the table body, but the accuracy is low and it is impossible to ensure that the base plate is completely level, which in turn affects the printing effect.

[0004] At the same time, the base plate needs to be lifted and lowered during printing to bring it closer to the nozzle in order to reduce the movement stroke of the nozzle during printing. Traditional lifting mostly uses a screw rod, but the friction between the screw rod and the nut is large, and wear will affect the lifting accuracy and life. Therefore, it is easy to print defective products, resulting in increased costs. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problem of low horizontal adjustment accuracy of the base of the existing 3D printer, a leveling structure is proposed.

[0007] Therefore, one of the objects of the present invention is to provide a leveling structure.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a leveling structure, comprising:

[0009] Base plate;

[0010] There are two fine-tuning mechanisms, which are symmetrically arranged at the bottom of the base plate, and include a leveling component and a detection component installed on the leveling component;

[0011] The leveling assembly includes a support plate and a turntable rotatably connected to the outer side of the support plate, an L-shaped support rod is symmetrically fixedly connected to the outer side of the turntable, and an adjusting member for driving the turntable to rotate is installed on the outer side of the support plate.

[0012] As a preferred solution of the leveling structure described in the utility model, the adjusting member includes a forward and reverse screw rod, both ends of which are installed on the outer side of the support plate through a bearing seat, and a knob for driving the forward and reverse screw rod to rotate is fixed at one end.

[0013] As a preferred solution of the leveling structure described in the utility model, wherein: the positive / negative threaded ends of the positive and negative screw rods are respectively threadedly connected to movable block one and movable block two, a conductor rod one passing through movable block two is fixed to the bottom of the movable block one, and a conductor rod two passing through movable block one is fixed above the movable block two.

[0014] As a preferred solution of the leveling structure of the utility model, wherein: the first conductor rod and the second conductor rod are both sleeved and fixed with a fixing sleeve, the two fixing sleeves are rotatably connected with an adjusting rod, and the upper end of the adjusting rod is rotatably connected to the L-shaped supporting rod.

[0015] As a preferred solution of the leveling structure of the utility model, the detection component includes a balance bar, both ends of the balance bar are fixed with fixing rods respectively connected to two L-shaped support rods, and a pointer is rotated in the middle section of the balance bar.

[0016] As a preferred solution of the leveling structure of the utility model, the detection component further includes a scale, which is engraved on the outside of the turntable and located at the bottom edge.

[0017] Beneficial effects of the utility model: the utility model adjusts the levels of both ends of the bottom plate through the fine-tuning mechanism, thereby promoting the overall level, has the characteristics of convenient adjustment and high precision, provides a basis for accurate printing, improves the qualified rate of product printing, and reduces the cost waste caused by the defective rate.

[0018] In view of the large friction between the lead screw and the nut of the above-mentioned existing lifting structure, the wear will affect the lifting accuracy and life, so it is easy to print defective products and increase costs. A lifting mechanism for a 3D printer substrate is proposed.

[0019] Therefore, the utility model also provides a lifting mechanism for a 3D printer substrate.

[0020] In order to solve the above technical problems, the utility model also provides the following technical solutions: including the above leveling structure, and also including:

[0021] The carrier mechanism comprises four supporting legs distributed in a rectangular shape, and the four supporting legs are fixed by a connecting plate.

[0022] As a preferred solution of the lifting mechanism of the 3D printer base plate of the utility model, the support leg includes a support column 1, a support column 2 is movably inserted at the upper end of the support column 1, and a movable groove 1 is vertically opened on the outer side of the support column 1, a notch is opened at the bottom end of the support column 2, and a pin is fixed on the inner side of the notch.

[0023] As a preferred solution of the lifting mechanism of the 3D printer substrate of the utility model, it also includes a lifting fine-adjustment mechanism, which is used to drive the pillar 2 to adjust the up and down displacement in the pillar 1, and includes a roller 1 and a roller 2 respectively passing through the two ends of the connecting plate, and the two ends of the roller 1 are fixed with a linkage gear 1, and the outside of the roller 1 is located on one side of the two linkage gears and is sleeved and fixed with a linkage rod 1, and the two ends of the roller 2 are fixed with a linkage gear 2, and the outside of the roller 2 is located on one side of the two linkage gears and is sleeved and fixed with a linkage rod 2, and the upper ends of the linkage rod 1 and the linkage rod 2 are both provided with a movable groove 2 that penetrates the movable groove 1 and is sleeved on the outside of the pin.

[0024] As a preferred solution of the lifting mechanism of the 3D printer substrate of the utility model, wherein: a driven gear is sleeved and fixed on the outside of the second rotating roller at the middle position, a transmission gear is meshed on one side of the driven gear, and the transmission gear is driven by a transmission motor.

[0025] The beneficial effects of the utility model are as follows: the utility model realizes the lifting and lowering of the substrate by the relative movement of the linkage gear 1 and the linkage gear 2, and then cooperates with the connecting rod 1 and the connecting rod 2 to drive the pillar 2 to adjust the up and down displacement in the pillar 1, and has the characteristics of sensitive response, synchronization and low wear, which improves the stability and response speed of the lifting and lowering, and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 It is a schematic diagram of the overall structure of the leveling structure of the utility model and the lifting mechanism of the 3D printer base plate.

[0028] Figure 2 It is a structural schematic diagram of the leveling structure of the utility model.

[0029] Figure 3 It is a structural schematic diagram of the leveling component in the leveling structure of the utility model.

[0030] Figure 4 It is a structural schematic diagram of the adjusting member in the leveling structure of the utility model.

[0031] Figure 5 It is a structural schematic diagram of the detection component in the leveling structure of the utility model.

[0032] Figure 6 It is a schematic diagram of the lifting mechanism structure of the base plate of the 3D printer of the utility model.

[0033] Figure 7 It is a structural schematic diagram of the support assembly in the lifting mechanism of the base plate of the 3D printer of the utility model.

[0034] Figure 8 It is a structural schematic diagram of the legs in the lifting mechanism of the base plate of the 3D printer of the utility model.

[0035] Fig. 9 It is a structural schematic diagram of the lifting drive assembly in the lifting mechanism of the base plate of the 3D printer of the utility model. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] Example 1

[0041] Reference Figure 1, provides a schematic diagram of the overall structure of a leveling structure and a lifting mechanism of a 3D printer substrate, such as Figure 1-4 , a leveling structure, comprising:

[0042] Bottom plate 100;

[0043] There are two fine-tuning mechanisms 200 , which are symmetrically arranged at the bottom of the base plate 100 and include a leveling component 201 ;

[0044] The leveling assembly 201 includes a support plate 201a and a turntable 201b rotatably connected to the outside of the support plate 201a. An L-shaped support rod 201c is symmetrically fixedly connected to the outside of the turntable 201b. An adjusting member 201d for driving the turntable 201b to rotate is installed on the outside of the support plate 201a.

[0045] Specifically, bolt pads are symmetrically installed at the bottom of the support plate 201a, and the height of the rotating pads is adjusted by rotating the spiral pads to ensure that they can be fully in contact with the ground, forming effective support and improving the stability of placement;

[0046] Specifically, the upper end of the L-shaped support rod 201c is fixed to the bottom of the bottom plate 100. When the turntable 201b rotates left and right, the bottom plate 100 can be driven to adjust the overall left and right angle and level.

[0047] Furthermore, the adjusting member 201d includes a forward and reverse screw rod 201d-1, both ends of which are installed on the outside of the support plate 201a through a bearing seat 201d-2, and one end of the forward and reverse screw rod 201d-1 is fixed with a knob 201d-3 for driving it to rotate. By rotating the knob 201d-3, the forward and reverse screw rod 201d-1 can be driven to rotate in the bearing seat 201d-2.

[0048] Furthermore, the positive / negative threaded ends of the positive / negative screw rod 201d-1 are respectively threadedly connected to the movable block 1 201d-4 and the movable block 201d-5, the bottom of the movable block 1 201d-4 is fixed with a conductor rod 1 201d-6 that passes through the movable block 201d-5, and the top of the movable block 201d-5 is fixed with a conductor rod 201d-7 that passes through the movable block 1 201d-4.

[0049] Specifically, threaded holes are provided on the movable block 1 201d-4 and the movable block 201d-5, and the movable block 1 201d-4 and the movable block 201d-5 are respectively threadedly connected to the positive / negative thread segments of the screw rod 201d-1 through the threaded holes. When the screw rod 201d-1 rotates, the movable block 1 201d-4 and the movable block 201d-5 move relatively along the positive / negative thread segments under the restriction of the conductor rod 1 201d-6 and the conductor rod 2 201d-7 through the thread characteristics. At the same time, the conductor rod 1 201d-6 and the conductor rod 2 201d-7 move in the same direction as the movable block 1 201d-4 and the movable block 201d-5, respectively. Therefore, the opposite movement of the conductor rod 1 201d-6 and the conductor rod 2 201d-7 is also relative movement.

[0050] Furthermore, a fixing sleeve 201d-8 is sleeved and fixed on the conductor rod 1 201d-6 and the conductor rod 2 201d-7, and an adjusting rod 201d-9 is rotatably connected to the two fixing sleeves 201d-8, and the upper end of the adjusting rod 201d-9 is rotatably connected to the L-shaped support rod 201c.

[0051] Specifically, a rotating shaft is fixed to the upper end of the adjusting rod 201d-9, and the rotating shaft is rotatably connected to one end of the L-shaped support rod 201c. The two fixed sleeves 201d-8 are respectively fixed on the wire rod 1 201d-6 and the wire rod 2 201d-7. Therefore, when the wire rod 1 201d-6 and the wire rod 201d-7 move relative to each other, the two fixed sleeves 201d-8 also move relative to each other. When the fixed sleeves 201d-8 move up and down, the turntable 201b will be driven to rotate left and right through the adjusting rod 201d-9, which can drive the overall left and right angle and horizontal adjustment of the base plate 100. This structure adjusts the level of the two ends of the base plate 100, thereby promoting the overall level. It has the characteristics of easy adjustment and high precision, provides a basis for accurate printing, improves the qualified rate of product printing, and reduces the cost waste caused by the defective rate.

[0052] Operation process: when adjustment is required, turn the knob 201d-3 to drive the forward and reverse screw rods 201d-1 to rotate in the bearing seat 201d-2. When the screw rod 201d-1 rotates, through the thread characteristics, the movable block 1 201d-4 and the movable block 201d-5 move relative to each other along the forward / reverse thread segments under the restriction of the conductor rod 1 201d-6 and the conductor rod 2 201d-7. At the same time, the conductor rod 1 201d-6 and the conductor rod 2 201d-7 move in the same direction as the movable block 1 201d-4 and the movable block 201d-5, respectively. Therefore, the opposite directions of the paths of the conductor rod 1 201d-6 and the conductor rod 2 201d-7 are also relative movements.

[0053] The two fixed sleeves 201d-8 are respectively fixed on the conductor rod 1 201d-6 and the conductor rod 201d-7. Therefore, when the conductor rod 1 201d-6 and the conductor rod 201d-7 move relative to each other, the two fixed sleeves 201d-8 also move relative to each other. When the fixed sleeves 201d-8 move up and down, the turntable 201b will be driven to rotate left and right through the adjusting rod 201d-9, which can drive the overall left and right angle and horizontal adjustment of the base plate 100.

[0054] Example 2

[0055] Reference Figure 5 This embodiment is different from the first embodiment in that the fine-tuning mechanism 200 also includes a detection component 202 installed on the leveling component 201, and the detection component 202 includes a balance rod 202a, both ends of the balance rod 202a are fixed with fixed rods 202b respectively connected to two L-shaped support rods 201c, and a pointer 202c is rotatable in the middle section of the balance rod 202a.

[0056] The detection component 202 also includes a scale, which is engraved on the outside of the rotating disk 201b and located at the bottom edge.

[0057] Specifically, the angle of the scale is 150°, and the pointer 202c points downward. Since the two L-shaped support rods 201c are arranged relatively to each other and are in a horizontal state, and the balance rod 202a is fixed on the two L-shaped support rods 201c, it is also a horizontal structure. When the two L-shaped support rods 201c change their angles as the turntable 201b rotates, there is a counterweight at the bottom of the pointer 202c. Therefore, even if the balance rod 202a is in a tilted state, the pointer 202c is still vertically downward under the counterweight and points on the scale. The scale pointed to is the tilt angle. When the balance rod 202a is horizontal until the pointer 202c points to the middle of the scale, it is horizontal. According to the direction of the pointer 202c, it can be more intuitively known whether it is in a horizontal state.

[0058] The rest of the structure is the same as that of Example 1.

[0059] Operation process: When the two L-shaped supporting rods 201c change their angles as the turntable 201b rotates, there is a counterweight at the bottom of the pointer 202c. Therefore, even if the balance bar 202a is in a tilted state, the pointer 202c is still vertically downward under the counterweight and points on the scale. The scale pointed to is the tilt angle. When the balance bar 202a is horizontal until the pointer 202c points to the middle of the scale, it is horizontal. According to the direction of the pointer 202c, it can be more intuitively known whether it is in a horizontal state.

[0060] Example 3

[0061] Reference Figure 6-9, this embodiment is different from the above embodiment in that: this embodiment discloses a lifting mechanism of a 3D printer substrate, including the above-mentioned leveling structure, and also includes:

[0062] The carrier mechanism 300 includes a support assembly 301 and a lifting drive assembly 302 installed on the support assembly 301;

[0063] The substrate 400 is fixed on the support assembly 301 .

[0064] Furthermore, the bracket assembly 301 includes four legs 301a distributed in a rectangular shape, and a connecting plate 301b is connected between the four legs 301a;

[0065] The support leg 301a includes a support column 1 301a-1, a support column 2 301a-2 is movably inserted into the upper end of the support column 1 301a-1, and a movable groove 1 301a-3 is vertically opened on the outer side of the support column 1 301a-1, a slot 301a-4 is opened at the bottom end of the support column 2 301a-2, and a pin 301a-5 is fixed on the inner side of the slot 301a-4.

[0066] Specifically, a cavity is provided at the upper end of the pillar 1 301a-1, and the length of the cavity is consistent with the length of the pillar 2 301a-2. By controlling the amount of the pillar 2 301a-2 inserted into the cavity, the overall length of the pillar 1 301a-1 and the pillar 2 301a-2 can be controlled, thereby achieving lifting;

[0067] Furthermore, the lifting drive assembly 302 is used to drive the pillar 2 301a-2 to adjust its up and down displacement in the pillar 1 301a-1, and includes a roller 1 302a and a roller 2 302b respectively passing through the two ends of the connecting plate 301b, and both ends of the roller 1 302a are fixed with a linkage gear 1 302c, and the outside of the roller 1 302a is located on one side of the two linkage gears 1 302c and is sleeved and fixed with a linkage rod 1 302d, and both ends of the roller 2 302b are fixed with a linkage gear 2 302e, and the outside of the roller 2 302b is located on one side of the two linkage gears 2 302e and is sleeved and fixed with a linkage rod 2 302f, and the upper ends of the linkage rod 1 302d and the linkage rod 2 302f are provided with a movable groove 2 302g that passes through the movable groove 1 301a-3 and is sleeved on the outside of the pin 301a-5.

[0068] Furthermore, a driven gear 302h is sleeved and fixed at the middle section of the outer portion of the second rotating roller 302b, and a transmission gear 302i is meshed on one side of the driven gear 302h, and the transmission gear 302i is driven by a transmission motor 302j;

[0069] Specifically, the transmission motor 302j drives the transmission gear 302i to rotate. The diameter of the transmission gear 302i is smaller than that of the driven gear 302h. The torque amplification can be achieved in the meshing transmission, so that the driven gear 302h can withstand a larger load. After the driven gear 302h rotates, it drives the roller 2 302b to rotate. The linkage gears 2 at both ends of the roller 2 302b drive the linkage gear 1 302c to rotate relatively, so that the linkage rod 1 302d and the linkage rod 2 302f rotate relatively, driving the pillar 2 301a-2 to adjust its up and down displacement in the pillar 1 301a-1, thereby realizing the lifting operation. It has the characteristics of sensitive response, synchronization and low wear, improves the stability and response speed of lifting, and reduces the maintenance cost.

[0070] The rest of the structure is the same as that of Example 2.

[0071] Operation process: The transmission motor 302j operates to drive the transmission gear 302i to rotate. The diameter of the transmission gear 302i is smaller than that of the driven gear 302h. The torque amplification can be achieved in the meshing transmission, so that the driven gear 302h can withstand a larger load. After the driven gear 302h rotates, it drives the rotating roller 2 302b to rotate. The linkage gears 2 at both ends of the rotating roller 2 302b drive the linkage gear 1 302c to rotate relatively, so that the linkage rod 1 302d and the linkage rod 2 302f rotate relatively, driving the pillar 2 301a-2 to move up and down in the pillar 1 301a-1, thereby realizing the lifting operation of the substrate 400.

[0072] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0073] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0074] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A leveling structure, characterized in that: include: Bottom plate (100); Two fine-adjustment mechanisms (200) are symmetrically arranged at the bottom of the base plate (100), and include a leveling component (201) and a detection component (202) installed on the leveling component (201); The leveling assembly (201) comprises a support plate (201a) and a turntable (201b) rotatably connected to the outside of the support plate (201a); an L-shaped support rod (201c) is symmetrically fixedly connected to the outside of the turntable (201b); and an adjusting member (201d) for driving the turntable (201b) to rotate is installed on the outside of the support plate (201a).

2. The leveling structure according to claim 1, characterized in that: The adjusting member (201d) comprises a forward and reverse screw rod (201d-1), both ends of which are mounted on the outside of the support plate (201a) via a bearing seat (201d-2), and a knob (201d-3) for driving the forward and reverse screw rod (201d-1) to rotate is fixed to one end of the forward and reverse screw rod (201d-1).

3. The leveling structure according to claim 2, characterized in that: The forward / reverse threaded ends of the forward and reverse screw rods (201d-1) are respectively threadedly connected to movable block one (201d-4) and movable block two (201d-5); a conductor rod one (201d-6) penetrating movable block two (201d-5) is fixed to the bottom of the movable block one (201d-4); and a conductor rod two (201d-7) penetrating movable block one (201d-4) is fixed to the top of the movable block two (201d-5).

4. The leveling structure according to claim 3, characterized in that: A fixing sleeve (201d-8) is sleeved and fixed on the first conductor rod (201d-6) and the second conductor rod (201d-7), and an adjusting rod (201d-9) is rotatably connected to the two fixing sleeves (201d-8), and the upper end of the adjusting rod (201d-9) is rotatably connected to the L-shaped supporting rod (201c).

5. The leveling structure according to claim 4, characterized in that: The detection assembly (202) comprises a balance bar (202a), both ends of which are fixed with fixing bars (202b) respectively connected to two L-shaped supporting bars (201c), and a pointer (202c) is rotatably disposed in the middle section of the balance bar (202a).

6. The leveling structure according to claim 5, characterized in that: The detection component (202) further comprises a scale, which is engraved on the outside of the rotating disk (201b) and located at the bottom edge.

7. A lifting mechanism for a 3D printer substrate, characterized in that: The leveling structure according to any one of claims 1 to 6 further comprises: The carrier mechanism (300) comprises a support assembly (301) and a lifting drive assembly (302) mounted on the support assembly (301); The base plate (400) is fixed above the support assembly (301).

8. The lifting mechanism of the 3D printer substrate as claimed in claim 7, characterized in that: The support assembly (301) comprises four supporting legs (301a) distributed in a rectangular shape, and a connecting plate (301b) is connected between the four supporting legs (301a); The supporting leg (301a) comprises a support column (301a-1), a support column (301a-2) being movably inserted at the upper end of the support column (301a-1), a movable groove (301a-3) being vertically provided at the outer side of the support column (301a-1), a notch (301a-4) being provided at the bottom end of the support column (301a-2), and a pin column (301a-5) being fixed at the inner side of the notch (301a-4).

9. The lifting mechanism of the 3D printer substrate as claimed in claim 8, characterized in that: The lifting drive assembly (302) is used to drive the second pillar (301a-2) to move up and down in the first pillar (301a-1), and comprises a roller (302a) and a roller (302b) respectively penetrating the two ends of the connecting plate (301b), and a linkage gear (302c) is fixed at both ends of the roller (302a), and a linkage rod (302c) is sleeved and fixed on the outside of the roller (302a) at one side of the two linkage gears (302c). (302d), linkage gears (302e) are fixed at both ends of the second rotating roller (302b), and linkage rods (302f) are sleeved and fixed on the outside of the second rotating roller (302b) at one side of the two linkage gears (302e), and movable grooves (302g) that penetrate movable grooves (301a-3) and are sleeved on the outside of the pin (301a-5) are formed at the upper ends of the first linkage rod (302d) and the second linkage rod (302f).

10. The lifting mechanism of the 3D printer substrate as claimed in claim 9, characterized in that: A driven gear (302h) is sleeved and fixed at the middle section of the outer portion of the rotating roller 2 (302b), and a transmission gear (302i) is meshed on one side of the driven gear (302h), and the transmission gear (302i) is driven by a transmission motor (302j).

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